42688487 has 2 divisors, whose sum is σ = 42688488. Its totient is φ = 42688486.

The previous prime is 42688463. The next prime is 42688501. The reversal of 42688487 is 78488624.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42688487 - 2⁶ = 42688423 is a prime.

It is a super-3 number, since 3×42688487³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42687487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21344243 + 21344244.

It is an arithmetic number, because the mean of its divisors is an integer number (21344244).

Almost surely, 2^42688487 is an apocalyptic number.

42688487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42688487 is an equidigital number, since it uses as much as digits as its factorization.

42688487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 47.

The square root of 42688487 is about 6533.6427052602. The cubic root of 42688487 is about 349.4917439207.

The spelling of 42688487 in words is "forty-two million, six hundred eighty-eight thousand, four hundred eighty-seven".